The California Supreme Court unanimously held August 15 that regulators did not violate the Clean Water Act by applying a cost-benefit standard to determine whether the Moss Landing Power Plant’s cooling water design reflected the best available technology to protect fish and other aquatic organisms. The U.S. Supreme Court (Entergy v. Riverkeeper Inc.) cleared the way for regulators to compare economic costs and environmental benefits when issuing National Pollutant Discharge Elimination System permits.